DATA I/O CORP — Director's Dealing 2004

May 26, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DATA I/O CORP (DAIO)
CIK: 0000351998
Period of Report: 2004-05-25

Reporting Person: BISCO INDUSTRIES INC (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-05-25	Data I/O	S	6100	$2.82	Disposed	392923	Indirect
2004-05-25	Data I/O	S	200	$2.96	Disposed	837373	Indirect